fn main() {
    use std::io::Read;
    let mut data = [0; 1];
    let mut stdin = ::std::io::stdin();
    stdin.read_exact(&mut data[..]).unwrap();

    let b0 = data[0] as i8;
    if b0 != -128 { // avoid overflow
        if -b0 == -75 {
            panic!()
        }
    }
}